If your answer is yes, so you have to install a freeware but great
program in the same time, I try it and it work for me, it should work
for you too.
From my expierience it remove spyware, trojans, and internet surfing viruses by 99.9% from my computer.
It is:
PC Tools AntiVirus Free Edition
Try it:
http://software-empire1.blogspot.com/2009/06/freeware-pc-tools-antivirus-free.html
Hope helped,
Zatari_soft